you can make the pastry by hand or in the food processor. Cream together the butter, sugar, and salt and then rub or pulse in the flour and egg yolks. When the mixture has come together, looking like coarse breadcrumbs, add the milk or water. Gently pat together to form a small ball of dough. Wrap and let rest for an hour.

carefully cut thin slices of the pastry (or you can roll out if you prefer) and place in and around the bottom and sides of a 12-inch (30-centimeter) tart pan. Push the pastry together and level out and tidy up the sides. Cover and let to rest in the freezer for about 1 hour.